That's what I meant too. Creating those kinds of fine distinctions with electrical stimuli will be incredibly complicated. Plus, to have two-way control of a robotic arm, they have to read motor control signals at the same time. But then again, it's amazing that they're even this close.

There have been other studies on how bad hospitals can be for sleep, but the conditions in this study looked pretty extreme compared to the average hospital stay. They were waking up the mice every 2 minutes for 7 days. Even the loudest hospital doesn't generate that kind of disruption.